集群Rab1通过影响病毒进入和宿主免疫反应来抑制结节病毒感染
Lingfeng Guan1, Xiaozhi Wen1, Zihan Zhang1
1College of Marine Sciences, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
Fish & shellfish immunology
|October 15, 2023
概括
这项研究表明,Epinephelus coioides Rab1 (EcRab1) 通过调节宿主免疫力和阻止病毒的进入来抑制红斑神经亡病毒 (RGNNV) 感染. 这就是EcRab1的意思.
科学领域:
- 病毒学 病毒学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- Rab1,一种保存的GTPase,对囊泡的流通和细胞功能至关重要.
- 群是经济上重要的鱼类,经常受到病毒性疾病的影响,特别是RGNNV.
- Rab1在鱼类抗病毒反应中的作用,特别是针对RGNNV,仍然在很大程度上未被探索.
研究的目的:
- 来自Epinephelus coioides的一种Rab1同类动物 (EcRab1) 的克隆和特征.
- 研究EcRab1在RGNNV感染和宿主免疫反应中的功能.
- 阐明 EcRab1 影响病毒进入和复制的机制.
主要方法:
- 克隆 EcRab1 基因并分析其蛋白质序列.
- 定量实时PCR用于评估EcRab1转录水平.
- 使用野生类型和突变EcRab1.1的亚细胞局部化研究.
- 过度表达和淘汰实验,以评估EcRab1在RGNNV感染中的作用.
- 病毒进入抑制试验.
主要成果:
- 在体外和体内,EcRab1的转录被RGNNV和poly (I:C) 调节.
- EcRab1局限于细胞质点,分布因主导负和构成性活跃突变而改变.
- 在晚期感染阶段,EcRab1与RGNNV共同局部化,其过度表达抑制了RGNNV感染.
- Knockdown of EcRab1促进了RGNNV感染,并且发现EcRab1可以抑制病毒的进入.
- EcRab1积极调节干扰素和炎症反应.
结论:
- EcRab1在鱼中对抗RGNNV的抗病毒防御中发挥着重要作用.
- EcRab1抑制RGNNV感染,可能通过调节宿主免疫反应和阻止病毒进入.
- EcRab1的GTP和GDP结合状态对于其对RGNNV感染的调节至关重要.
- 这些发现有助于理解鱼类的抗病毒机制,并开发新的抗病毒策略.
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